Sounds like she's just fine. And I have a hen I call my "goat-chicken" because she sounds more like a lost baby goat than a chicken! They can make some odd noises. She's also the one "most likely to go sit in the nest box for an hour and NOT lay". Just the way she is. If your hen is eating...
You might and you might not. It's typical of them to go into the nest box and hang out but not lay. Mine still do that sometimes and they've been laying since last fall.
If she just started laying (by her age I'm guessing that's correct) it's not at all unusual for her to lay in spurts like that. If she's eating, drinking and walking normally she's fine. If she's walking like a penguin or sitting looking uncomfortable, you will want to check for a stuck egg. But...